Cosmetic brush



FIG. 1 is a perspective view of cosmetic brush;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing a brush head and a ferrule is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM The ornamental design for cosmetic brush, as shown and described is claimed. 